A metal-free photoinduced deaminative strategy for C-4 alkylation of coumarins using redox activated secondary and benzylic amine derived Katritzky pyridinium salts has been established and demonstrated efficiently.
Visible light mediated novel metal-free, oxidant free phosphoric acid catalysed method for the synthesis of 2-selanyl NHCbz-tryptamine/3-subtituted indole is presented. This direct C-2 selenation strategy, with environmental benign conditions by reaction of tryptamine/3-substituted indole and diaryl/dialkyl selenide, allows access to a wide range of 2-aryl/alkyl selanyl NHCbz-tryptamines/3-substituted indoles. An experimental investigation using UV-Vis, Cyclic voltammetry and controlled experiments sheds insight on the plausible mechanism.
An unprecedented, straightforward photochemical platform for efficient site-selective C-H alkylation of C7 position of benzocore via the cross coupling between coumarins and NHPI ester, employing Ru(II) as photocatalyst in visible...
A metal-free, photochemical protocol for C-4 alkylation of 2-iminochromene has been reported by employing naturally abundant feedstock carboxylic acid. Selective C-4 alkylation under photoredox condition to access C-4 alkylated 2-iminochromene...
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